READ THE INSTRUCTIONS. I didn't and as a result, the oil filter wasn't tight enough. I was so over-confident in how I installed it, I didn't even check for drips, much less the trail of blowing oil left inside my garage and down the road. VERY GRATEFUL to K&N service for telling me the correct way (no oil on the gasket at all) and to really tighten it hard. They also offered to send me a free replacement filter. I need to find more parts to order from K&N.

When I recieved my order, the box was destroyed and re-taped. One of the items was missing, I called K&N and they sent one out the same day.
Great customer service, will order from them again. P.S. I haven't installed the oil filter yet.